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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/analysis-predicatefilter-tokenfilter.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/analysis-predicatefilter-tokenfilter.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/analysis-predicatefilter-tokenfilter.html" rel="nofollow" target="_blank">../en/analysis-predicatefilter-tokenfilter.html</a></div>
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<h2 class="title">
<a id="analysis-predicatefilter-tokenfilter"></a>Predicate script token filter<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis/tokenfilters/predicate-tokenfilter.asciidoc">edit</a>
</h2>
</div></div></div>

<p>The predicate_token_filter token filter takes a predicate script, and removes tokens that do
not match the predicate.</p>
<h3>
<a id="_options_6"></a>Options<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis/tokenfilters/predicate-tokenfilter.asciidoc">edit</a>
</h3>
<div class="informaltable">
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<p>
script
</p>
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<p>
a predicate script that determines whether or not the current token will
be emitted.  Note that only inline scripts are supported.
</p>
</td>
</tr>
</tbody>
</table>
</div>
<h3>
<a id="_settings_example_2"></a>Settings example<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis/tokenfilters/predicate-tokenfilter.asciidoc">edit</a>
</h3>
<p>You can set it up like:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT /condition_example
{
    "settings" : {
        "analysis" : {
            "analyzer" : {
                "my_analyzer" : {
                    "tokenizer" : "standard",
                    "filter" : [ "my_script_filter" ]
                }
            },
            "filter" : {
                "my_script_filter" : {
                    "type" : "predicate_token_filter",
                    "script" : {
                        "source" : "token.getTerm().length() &gt; 5"  <a id="CO418-1"></a><i class="conum" data-value="1"></i>
                    }
                }
            }
        }
    }
}</pre>
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<div class="console_widget" data-snippet="snippets/971.console"></div>
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<p><a href="#CO418-1"><i class="conum" data-value="1"></i></a></p>
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<p>This will emit tokens that are more than 5 characters long</p>
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<p>And test it like:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">POST /condition_example/_analyze
{
  "analyzer" : "my_analyzer",
  "text" : "What Flapdoodle"
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/972.console"></div>
<p>And it’d respond:</p>
<div class="pre_wrapper lang-console-result">
<pre class="programlisting prettyprint lang-console-result">{
  "tokens": [
    {
      "token": "Flapdoodle",        <a id="CO419-1"></a><i class="conum" data-value="1"></i>
      "start_offset": 5,
      "end_offset": 15,
      "type": "&lt;ALPHANUM&gt;",
      "position": 1                 <a id="CO419-2"></a><i class="conum" data-value="2"></i>
    }
  ]
}</pre>
</div>
<div class="calloutlist">
<table border="0" summary="Callout list">
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<td align="left" valign="top" width="5%">
<p><a href="#CO419-1"><i class="conum" data-value="1"></i></a></p>
</td>
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<p>The token <em>What</em> has been removed from the tokenstream because it does not
match the predicate.</p>
</td>
</tr>
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<td align="left" valign="top" width="5%">
<p><a href="#CO419-2"><i class="conum" data-value="2"></i></a></p>
</td>
<td align="left" valign="top">
<p>The position and offset values are unaffected by the removal of earlier tokens</p>
</td>
</tr>
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